import { ChessRules, PiPo, Move } from "@/base_rules";
-export const VariantRules = class EnpassantRules extends ChessRules {
-
+export class EnpassantRules extends ChessRules {
static IsGoodEnpassant(enpassant) {
if (enpassant != "-") {
const squares = enpassant.split(",");
const divisor = Math.min(Math.abs(delta[0]), Math.abs(delta[1]));
step = [delta[0]/divisor || 0, delta[1]/divisor || 0];
} else {
- step = [delta[0]/Math.abs(delta[0]) || 0, delta[1]/Math.abs(delta[1]) || 0];
+ step = [
+ delta[0]/Math.abs(delta[0]) || 0,
+ delta[1]/Math.abs(delta[1]) || 0
+ ];
}
let res = [];
for (
return moves;
}
- // TODO: this getPotentialPawnMovesFrom() is mostly duplicated:
- // it could be split in "capture", "promotion", "enpassant"...
- getPotentialPawnMoves([x, y]) {
- const color = this.turn;
- let moves = [];
- const [sizeX, sizeY] = [V.size.x, V.size.y];
- const shiftX = color == "w" ? -1 : 1;
- const startRank = color == "w" ? sizeX - 2 : 1;
- const lastRank = color == "w" ? 0 : sizeX - 1;
-
- const finalPieces =
- x + shiftX == lastRank
- ? [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN]
- : [V.PAWN];
- // One square forward
- if (this.board[x + shiftX][y] == V.EMPTY) {
- for (let piece of finalPieces) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y], {
- c: color,
- p: piece
- })
- );
- }
- if (
- x == startRank &&
- this.board[x + 2 * shiftX][y] == V.EMPTY
- ) {
- // Two squares jump
- moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y]));
- }
- }
- // Captures
- for (let shiftY of [-1, 1]) {
- if (
- y + shiftY >= 0 &&
- y + shiftY < sizeY &&
- this.board[x + shiftX][y + shiftY] != V.EMPTY &&
- this.canTake([x, y], [x + shiftX, y + shiftY])
- ) {
- for (let piece of finalPieces) {
- moves.push(
- this.getBasicMove([x, y], [x + shiftX, y + shiftY], {
- c: color,
- p: piece
- })
- );
- }
- }
- }
-
- // En passant
+ getEnpassantCaptures([x, y], shiftX) {
const Lep = this.epSquares.length;
const squares = this.epSquares[Lep - 1];
+ let moves = [];
if (!!squares) {
const S = squares.length;
const taken = squares[S-1];
}
});
}
-
return moves;
}